package com.youku.util;

import org.apache.commons.lang3.StringUtils;

public class CronExpressionHelper {

	public static String build(String cronExpression) {
		return StringUtils.isBlank(cronExpression) ? defaultExp() : cronExpression;
	}

	private static String defaultExp() {
		// "0 0 12 * * ?"
		return "*/15 * * * * ?";
	}

}
